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Janssen, D. (author)The dissertation explores the use of emergency measures, particularly the BresDefender, to prevent or delay levee failure and mitigate the impacts of floods, focusing on the Netherlands' flood protection systems. Levees are vital for protecting low-lying areas, but there's always a risk of failure, leading to significant societal and material...doctoral thesis 2024
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Stumpf, Martin (author), Antonini, Giulio (author), Lager, I.E. (author)The transient electromagnetic (EM) excitation of a narrow slot in a perfectly electrically conducting (PEC) screen that separates two homogeneous dielectric halfspaces, a simplified model of a typical feeding structure of leaky lens antennas, is analyzed numerically in the time domain (TD). The problem is formulated using the TD reciprocity...journal article 2024
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Homborg, A.M. (author), Mol, J.M.C. (author), Tinga, Tiedo (author)This paper for the first time treats the interpretation of electrochemical noise time-frequency spectra as an image classification problem. It investigates the application of a convolutional neural network (CNN) for deep learning image classification of electrochemical noise time-frequency transient information. Representative slices of these...journal article 2024
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de Hoog, E. (author), van der Voort, Tjalie (author), Talmon, A.M. (author), van Rhee, C. (author)Hydraulic transport pipelines in the dredging, mining and deep sea mining are designed using steady-state methods. However, these methods cannot predict density wave formation. Density waves form a risk for pipeline blockages, therefore there is a need to understand and preferably be able to model the process. The density waves studied in...journal article 2024
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Martin, H.A. (author), Smits, Edsger C.P. (author), Poelma, René H. (author), van Driel, W.D. (author), Zhang, Kouchi (author)This article introduces an online condition monitoring strategy that utilizes a transient heat pulse to detect package thermal performance degradation. The metric employed is the temperature-dependent transient thermal impedance "Zth(t, Tamb)."The proposed methodology offers quantitative insights into package thermal performance degradation...journal article 2024
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Aigner, Lukas (author), Werthmüller, D. (author), Flores Orozco, Adrián (author)We investigate the application of the distance-based global sensitivity analysis (DGSA) to evaluate the sensitivity of electrical model parameters obtained from transient electromagnetic (TEM) data including induced polarization (IP) effects. We propose novel open-source forward modeling and inversion routines for single-loop TEM data...journal article 2024
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Kaaks, B.J. (author), Couweleers, S.D. (author), Lathouwers, D. (author), Kloosterman, J.L. (author), Rohde, M. (author)This work presents two color LIF temperature measurements for the transient freezing in a square channel under laminar flow conditions. This is the first time non-intrusive temperature measurements were performed within the thermal boundary layer during the transient growth of an ice layer in internal flow. A combination of a local outlier...journal article 2024
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Wei, Z. (author)Photoinduced charge transfer (CT) is a fundamental photophysical process that prevails in nature but also plays a pivotal role in various technological fields. This thesis describes spectroscopic studies on photoinduced CT in donor-bridge-acceptor (DBA) systems and their derivatives. Throughout this work, we employ femtosecond transient...doctoral thesis 2023
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Amani, J. (author)It is widely recognized in engineering fracture mechanics that integral and differential forms of nonlocal damage models with a constant internal length scale suffer from an incorrect representation of failure mechanisms either by spurious damage growth or by incorrect damage initiation and propagation. In this regard, in this thesis, a...doctoral thesis 2023
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Sattari, R. (author), Hu, D. (author), Liu, X. (author), van Zeijl, H.W. (author), Vollebregt, S. (author), Zhang, Kouchi (author)The rapid development of power electronics has challenged the thermal integrity of semiconductor packaging. Further developments in this domain can be supported significantly by utilizing fast and flexible thermal characteristic evaluation. This study employs the transient dual interface method (TDIM) to characterize and compare the thermal...journal article 2023
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Oikonomidis, Silvestros (author), Ramdin, M. (author), Moultos, O. (author), Bos, Albert (author), Vlugt, T.J.H. (author), Rahbari, A. (author)Due to the intermittency of renewable energy sources, alkaline water electrolyzers are typically operated at partial load compared to the nominal design value. It is well-known that gas crossover is dominant at low current densities leading to higher anodic hydrogen content and higher cathodic oxygen content in the separator tanks. High...journal article 2023
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Nasirpour, F. (author), Heidary, Amir (author), Ghaffarian Niasar, M. (author), Lekić, A. (author), Popov, M. (author)High local electric field intensity in transformer windings originating from transient signals is one of the reasons for transformer failures. Due to the integration of renewable energy sources into the power grids and the increased number of transients, the likelihood of transformer catastrophic failure increases accordingly. Therefore, to...journal article 2023
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Valiya Valappil, S. (author), Goosen, J.F.L. (author), Aragon, A.M. (author)Ultrasonic flowmeters that use transit-time ultrasonic transducers face measurement errors due to 'crosstalk,' whereby the working signal travels through the pipe wall and couplings, interfering with the signal from the fluid. Although various procedures have been proposed to solve the issue of crosstalk, they're limited to low-frequency...journal article 2023
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Heidary, Amir (author), Ghaffarian Niasar, M. (author), Popov, M. (author), Lekić, A. (author)Due to the extension of the power grid with many complex and compact pieces of power equipment, transformers will be more exposed to fast transient, resulting from various resonance conditions. Transformer resonance can result in severe overvoltage on internal parts of the winding, leading to insulation failure and, consequently, transformer...journal article 2023
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M Fadel, M. (author), Meneses Rioseco, Ernesto (author), Bruna, P.B.R. (author), Moeck, Inga (author)The heterogeneity of the Upper Jurassic carbonate reservoir (Malm reservoir) beneath the North Alpine Foreland Basin has a significant influence on the mass and heat flow processes during geothermal exploitation. Geophysical borehole data revealed that sub-seismic scale fractures and karstified fractures occur at the inflow zones of deep...journal article 2023
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Marchand, J. (author), Perilla Guerra, A.D. (author), Garapati, M. (author), Gonzalez-Longatt, Francisco (author), Rueda, José L. (author)Distantly-located offshore energy hubs need to be connected to the shore via High Voltage Direct Current (HVDC) links to allow for an efficient bulk power exchange. A bipolar configuration of the HVDC link is suitable for a point-to-point connection, as it provides redundancy, and, therefore, a larger reliability, e.g. half of the rated transfer...conference paper 2023
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Nedumaran, Muthamil Selvan (author), Gnanasekaran, Nagarajan (author), Hooman, K. (author)The present study compares a modified variable height fin heat sink with the conventional constant height fin heat sink. The two heat sinks are filled with an equal volume of PCM (n-eicosane) and a fin volume fraction of 8 %. The experiments are performed for constant loads and also different power surge conditions. The pulsed heat loads are...journal article 2023
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Xie, H. (author), Bellizio, Federica (author), Cremer, Jochen (author), Strbac, Goran (author)Due to the increasing system stability issues caused by the technological revolutions of power system equipment, the assessment of the dynamic security of the systems for changing operating conditions (OCs) is nowadays crucial. To address the computational time problem of conventional dynamic security assessment tools, many machine learning ...conference paper 2023
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Yang, Y. (author), Huang, Mo (author), Du, S. (author), Martins, Rui P. (author), Lu, Yan (author)High-frequency buck converters need a fast transition of switching nodes (high dv/dt). Such high dv/dt, especially the positive one, can cause malfunction of a conventional pulse-triggered active-coupled (PTAC) level shifter that is used to control the high-side NMOS switch. In this work, we first discuss the dv/dt immunity of conventional PTAC...journal article 2023
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Dimitriou, Dimitris (author), Nastos Konstantopoulos, C. (author), Saravanos, Dimitris (author)A multiresolution finite wavelet domain method, that utilizes Daubechies wavelet and scaling functions for the hierarchical approximation of state variables, is presented. The multiresolution approximation yields a hierarchical set of equations of motion involving the coarse component of generalized displacements, while additional equations...conference paper 2023